Two articles, one published in the journal “Astronomy and Astrophysics” and one in “The Astrophysical Journal Letter”, describe two researches on the consequences of the merger of two neutron stars detected last year at electromagnetic and gravitational waves. ESA’s XMM-Newton space telescope was used to monitor the evolution of its X-ray emissions. NASA’s Chandra X-ray observatory was similarly used and a team of researchers concluded that the merger generated a black hole.
An image published by ESO shows the Tarantula Nebula along with the neighboring areas in their details. A team of astronomers used the VLT Survey Telescope (VST) at ESO’s Paranal Observatory, in Chile, to capture unseen details of star clusters, bright gas clouds and supernova remnants scattered around. It’s the sharpest image ever obtained of that region of the Large Magellanic Cloud, one of the Milky Way’s satellite dwarf galaxies.
An article published in “The Astrophysical Journal” describes the study of a pulsar cataloged as PSR J2215+5135 which is extreme even for this category of objects. A team of researchers from the Universitat Politècnica de Catalunya (UPC) and the Canary Islands Institute of Astrophysics (IAC) used an innovative method to measure the mass of one of the most massive neutron stars discovered, estimated in 2.3 times the Sun’s. This is a method that can also be used with other objects.
An article published in the journal “Nature” describes a high resolution observation of a pulsar cataloged as PSR B1957+20. A team of astronomers used data collected using the Arecibo radio telescope, obtaining one of the best results in the history of astronomy thanks to the presence of a trail of plasma left by a brown dwarf, a companion of the pulsar in a binary system. According to the astronomers, the lens effect generated suggests that it’s also the cause of fast radio bursts.
An article published in the journal “The Astrophysical Journal Supplement Series” describes the results of the CARMA-NRO Orion Survey, a high-resolution mapping of the molecular cloud called Orion A, one of the two giant molecular clouds in the Orion molecular cloud complex. A team of astronomers combined the observations of the CARMA and NRO radio telescopes to map the stars but also the gas movements inside the cloud.